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Published on: November 30, 2022
El cobre ((I) catalizó la exociclización borilativa de haluros de alquenilo que contienen un enlace doble no activado
Koji Kubota1, Eiji Yamamoto, Hajime Ito
1Division of Chemical Process Engineering and Frontier Chemistry Center, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060-8628, Japan.
Journal of the American Chemical Society
|January 29, 2013
Resumen
Este estudio introduce un nuevo método de exociclización borilativa utilizando cobre para sintetizar boronatos de cicloalquilo estirados a partir de haluros de alquenilo y alquenos simples.
Área de la Ciencia:
- Química orgánica es la química orgánica.
- Química organometálica Química orgánica de los metales.
Sus antecedentes:
- Los haluros de alquenilo son precursores sintéticos comunes.
- La síntesis de estructuras de cicloalquilo estiradas sigue siendo un desafío.
Objetivo del estudio:
- Desarrollar un nuevo método para sintetizar alquilboronatos con motivos de cicloalquilo tensados.
- Para investigar el mecanismo de la exociclización borilativa.
Principales métodos:
- Adición regioselectiva de un intermediario de borilo-cobre (I) a los alquenos terminales.
- Sustitución intramolecular de alquilcobre para grupos que dejan halogenuros.
- Estudios mecánicos experimentales y teóricos.
Principales resultados:
- Síntesis exitosa de alquilboronatos con estructuras de cicloalquilo forzadas.
- Demostración de una vía de exociclización borilativa regioselectiva.
- Elucidación del mecanismo de reacción que involucra intermediarios de cobre.
Conclusiones:
- La exociclización borilativa reportada ofrece una nueva ruta sintética a valiosos compuestos de organoboron.
- Este método permite la construcción de estructuras cíclicas complejas a partir de materiales de partida fácilmente disponibles.
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